B106F - Understanding the Body Control Module Fault in 2015-2021 Chevrolet and GMC Models

Quick Answer

B106F means: B106F indicates a fault in the Body Control Module, affecting various electronic systems in your vehicle.

Fix: Check and replace faulty components Cost: $300 - $600 Time: 90-180 minutes

Can I drive with B106F? Address the issue immediately to avoid further electrical problems.

Common Questions

What does B106F mean and how does it affect my car?

B106F indicates a fault in the Body Control Module, which can disrupt various electronic functions in your vehicle. This can lead to issues with power windows, door locks, and interior lighting, impacting your overall driving experience.

What are the most common causes of B106F and how much does it cost to fix?

Common causes of B106F include a faulty Body Control Module, poor electrical connections, or damaged wiring. Repair costs can range from $100 for wiring repairs to $600 for BCM replacement.

Can I drive my car with B106F or should I stop immediately?

While you may be able to drive short distances, it’s not advisable to ignore the B106F code as it can lead to critical system failures. It's best to have your vehicle inspected and repaired as soon as possible.

How can I diagnose B106F myself using GeekOBD APP?

Using the GeekOBD APP, connect to your vehicle's OBD2 port and scan for codes. The app will display the B106F code along with freeze frame data, helping you understand the context in which it occurred.

What vehicles are most commonly affected by B106F?

B106F commonly affects Chevrolet and GMC models from 2015 to 2021, including the Silverado and Sierra. Owners of these vehicles should be particularly vigilant about electrical system diagnostics.

How can I prevent B106F from happening again?

To prevent B106F, ensure regular vehicle maintenance, check electrical connections for corrosion, and avoid exposing wiring to moisture. Keeping the BCM software updated can also help prevent issues.

What is B106F?

The diagnostic trouble code (DTC) B106F refers to a fault detected in the Body Control Module (BCM), which is crucial for managing various electronic functions in your vehicle, specifically related to the body systems like lighting, windows, and locks. When this code appears, it indicates that the BCM has identified a malfunction within its circuit or associated components. This issue can stem from a variety of causes, including a faulty BCM, poor electrical connections, or issues with the wiring harness. In practical terms, if you're experiencing B106F, you might notice that features such as your power windows, door locks, or interior lights may not function as expected. Ignoring this code can lead to further electrical issues and potentially leave you stranded if critical systems fail. Regular diagnostics and timely repairs are essential to ensure that all body control functions operate smoothly. Additionally, the B106F code is particularly common in Chevrolet and GMC vehicles manufactured between 2015 and 2021, such as the Chevrolet Silverado and GMC Sierra, emphasizing the importance of addressing this code promptly to avoid larger electrical malfunctions.

System: B - Body (Airbags, Lighting, Security, Climate Control)

Symptoms

Common symptoms when B106F is present:

  • The check engine light or other warning lights may illuminate on the dashboard, indicating an underlying issue that needs attention.
  • You might experience intermittent failures of electronic components such as power windows or door locks, leading to frustration during use.
  • There can be issues with the vehicle's interior lighting, such as lights not turning on or off when the doors are opened or closed, creating inconvenience.
  • The vehicle may exhibit erratic behavior in its electronic systems, like random activation of alarms or flickering lights.
  • In some cases, the BCM might prevent the vehicle from starting, leaving you unable to use it until the issue is resolved.

Possible Causes

Most common causes of B106F (ordered by frequency):

  1. The most common cause of B106F is a faulty Body Control Module, with a likelihood of around 60%. This can happen due to age or electrical surges.
  2. Another potential cause could be poor electrical connections or damaged wiring harnesses, often resulting from wear and tear or exposure to moisture, with about a 25% possibility.
  3. Corrosion at the BCM connectors can also trigger this code, leading to intermittent or complete failures of the BCM functions. Regular maintenance can help prevent this.
  4. Less common causes include software glitches in the BCM that may require reprogramming to resolve the issue, though these are rarer (around 10%).
  5. On rare occasions, an issue with related components, such as a malfunctioning key fob or sensor, may lead to the B106F code appearing in the system.

B106F Repair Costs

Cost Breakdown by Repair Type

Replace Body Control Module

Replacing the faulty BCM with a new or remanufactured unit.

  • Total: $300 - $600
  • Success rate: 85%
Repair Wiring Harness

Repairing or replacing damaged wiring harness connections.

  • Total: $100 - $300
  • Success rate: 75%
Reprogram BCM

Reprogramming the BCM to fix any software-related issues.

  • Total: $100 - $200
  • Success rate: 70%
Money-Saving Tips for B106F
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional B106F Diagnosis Process

Follow these systematic steps to accurately diagnose B106F. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (5-10 minutes). Look for frayed wires or loose connectors near the BCM.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (10-15 minutes). This will help identify additional related issues.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and its connections (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the BCM and its connections (20-30 minutes). Verify voltages and continuity in the wiring.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes (10-15 minutes). Ensure all electronic functions controlled by the BCM are working correctly.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the code does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the code does not reappear (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: BCM Replacement on a 2018 Chevrolet Silverado

Vehicle: 2018 Chevrolet Silverado, 45,000 miles

Problem: The customer reported that the power locks and interior lights were not functioning.

Diagnosis: After scanning with the GeekOBD APP, the B106F code was present, indicating a BCM issue. Visual inspection revealed corrosion on the BCM connectors.

Solution: The BCM was replaced, and all connections were cleaned and sealed to prevent future corrosion.

Cost: $450 (including parts and labor)

Result: After the repair, the vehicle's electrical systems functioned correctly, and the B106F code did not reappear.

Case Study 2: Wiring Harness Repair on a 2017 GMC Sierra

Vehicle: 2017 GMC Sierra, 60,000 miles

Problem: The vehicle experienced intermittent power window failures and dashboard warning lights.

Diagnosis: Diagnostic testing revealed the B106F code, with a visual inspection showing frayed wiring leading to the BCM.

Solution: The damaged wiring was repaired, and the BCM was reprogrammed to ensure functionality.

Cost: $200 (specific cost breakdown for wiring repair)

Result: Post-repair testing showed all systems functioning normally, and the B106F code was cleared successfully.

Diagnose B106F

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: B106F
System: Body (Airbags, Lighting, Security, Climate Control)
Severity: HIGH
Category: Body Codes